cleanup: warnings, spelling

source/blender/blenkernel/intern/data_transfer.c

@@ -973,7 +973,7 @@ bool BKE_object_data_transfer_dm(
 
 	MeshPairRemap geom_map[DATAMAX] = {{0}};
 	bool geom_map_init[DATAMAX] = {0};
-	ListBase lay_map = {0};
+	ListBase lay_map = {NULL};
 	bool changed = false;
 
 	const bool use_delete = false;  /* We never delete data layers from destination here. */

source/blender/blenkernel/intern/mesh_remap.c

@@ -1427,7 +1427,7 @@ void BKE_mesh_remap_calc_loops_from_dm(
 					best_island = use_islands ? island_store.islands[best_island_index] : NULL;
 					as_graph = &as_graphdata[best_island_index];
 					poly_island_index_map = (int *)as_graph->custom_data;
-					BLI_astar_solution_init(as_graph, &as_solution, false);
+					BLI_astar_solution_init(as_graph, &as_solution, NULL);
 				}
 
 				for (plidx_dst = 0; plidx_dst < mp_dst->totloop; plidx_dst++) {

source/blender/editors/render/render_preview.c

@@ -1100,7 +1100,7 @@ static void icon_preview_free(void *customdata)
 
 void ED_preview_icon_render(Scene *scene, ID *id, unsigned int *rect, int sizex, int sizey)
 {
-	IconPreview ip = {0};
+	IconPreview ip = {NULL};
 	short stop = false, update = false;
 	float progress = 0.0f;
 

source/blender/windowmanager/intern/wm_files.c

@@ -535,11 +535,13 @@ bool WM_file_read(bContext *C, const char *filepath, ReportList *reports)
 }
 
 
-/* called on startup,  (context entirely filled with NULLs) */
-/* or called for 'New File' */
-/* both startup.blend and userpref.blend are checked */
-/* the optional paramater custom_file points to an alterntive startup page */
-/* custom_file can be NULL */
+/**
+ * called on startup,  (context entirely filled with NULLs)
+ * or called for 'New File'
+ * both startup.blend and userpref.blend are checked
+ * the optional parameter custom_file points to an alterntive startup page
+ * custom_file can be NULL
+ */
 int wm_homefile_read(bContext *C, ReportList *reports, bool from_memory, const char *custom_file)
 {
 	ListBase wmbase;